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<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		nav{
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			margin-left: 10px;
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		.top{
			border: 1px solid #ccc;
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<body>
	<nav><a href="#">1</a></nav>
	<nav><a href="#">1</a></nav>
	<nav><a href="#">1</a></nav>
	<nav><a href="#">1</a></nav>
	<nav><a href="#">1</a></nav>



	<input type="text" list="xl">
	<datalist id="xl">
		<option value="sas"></option>
		<option value="sas"></option>
		<option value="sas"></option>
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	</datalist>
	<div class="top" contenteditable="true"></div>
	<ruby>段<mark>嘉</mark><rt>鑫</rt></ruby>
	<p><mark>段</mark></p>
	<progress value="10" max="20"></progress>
	<meter value="10" max="100" ></meter>
	<details>
		<summary>飒飒</summary>
		<a>sasas</a>
		<a>sasas</a>
		<a>sasas</a>
		<a>sasas</a>
		<a>sasas</a>
	</details>
</body>
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